#include<iostream>
using namespace std;
class CMyclass{
	public:
		int n;
		CMyclass(){};
		CMyclass(CMyclass &c){n=2*c.n;}
};
int main()
{
	CMyclass c1,c2;
	c1.n=5,c2=c1;
	CMyclass c3(c1);
	cout<<"c2.n="<<c2.n<<",";
	cout<<"c3.n="<<c3.n<<endl;
	return 0;
}